A. Sozzetti
The GAPS programme with HARPS-N at TNG VI. The curious case of TrES-4b
Sozzetti, A.; Bonomo, A.S.; Biazzo, K.; Mancini, L.; Damasso, M.; Desidera, S.; Gratton, R.; Lanza, A.F.; Poretti, E.; Rainer, M.; Malavolta, L.; Affer, L.; Barbieri, M.; Bedin, L.R.; Boccato, C.; Bonavita, M.; Borsa, F.; Ciceri, S.; Claudi, R.U.; Gandolfi, D.; Giacobbe, P.; Henning, T.; Knapic, C.; Latham, D.W.; Lodato, G.; Maggio, A.; Maldonado, J.; Marzari, F.; Martinez Fiorenzano, A.F.; Micela, G.; Molinari, E.; Mordasini, C.; Nascimbeni, V.; Pagano, I.; Pedani, M.; Pepe, F.; Piotto, G.; Santos, N.; Scandariato, G.; Shkolnik, E.; Southworth, J.
Authors
A.S. Bonomo
K. Biazzo
L. Mancini
M. Damasso
S. Desidera
R. Gratton
A.F. Lanza
E. Poretti
M. Rainer
L. Malavolta
L. Affer
M. Barbieri
L.R. Bedin
C. Boccato
M. Bonavita
F. Borsa
S. Ciceri
R.U. Claudi
D. Gandolfi
P. Giacobbe
T. Henning
C. Knapic
D.W. Latham
G. Lodato
A. Maggio
J. Maldonado
F. Marzari
A.F. Martinez Fiorenzano
G. Micela
E. Molinari
C. Mordasini
V. Nascimbeni
I. Pagano
M. Pedani
F. Pepe
G. Piotto
N. Santos
G. Scandariato
E. Shkolnik
Dr John Taylor j.k.taylor@keele.ac.uk
Abstract
We update the TrES-4 system parameters using high-precision HARPS-N radial-velocity measurements and new photometric light curves. A combined spectroscopic and photometric analysis allows us to determine a spectroscopic orbit with a semi-amplitude K = 51 ± 3 m?s-1. The derived mass of TrES-4b is found to be Mp = 0.49 ± 0.04 MJup, significantly lower than previously reported. Combined with the large radius (Rp = 1.84-0.09+0.08 RJup) inferred from our analysis, TrES-4b becomes the transiting hot Jupiter with the second-lowest density known. We discuss several scenarios to explain the puzzling discrepancy in the mass of TrES-4b in the context of the exotic class of highly inflated transiting giant planets.
Journal Article Type | Article |
---|---|
Acceptance Date | Jan 19, 2015 |
Online Publication Date | Mar 5, 2015 |
Publication Date | 2015-03 |
Publicly Available Date | Mar 29, 2024 |
Journal | ASTRONOMY & ASTROPHYSICS |
Print ISSN | 0004-6361 |
Publisher | EDP Sciences |
Peer Reviewed | Peer Reviewed |
Volume | 575 |
Article Number | L15 |
DOI | https://doi.org/10.1051/0004-6361/201425570 |
Keywords | stars: individual: TrES-4b, planetary systems, techniques: radial velocities, techniques: spectroscopic, techniques: photometric |
Publisher URL | https://doi.org/10.1051/0004-6361/201425570 |
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Publisher Licence URL
https://creativecommons.org/licenses/by/4.0/
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